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【单选题】
若函数 是某个连续随机变量X的概率密度，则I=（）A.
[0,π/2]
B.
[0,π]
C.
[0,3π/2]
D.
[0,2π]
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【简答题】请翻译 SPAC
【单选题】In fact, it has one-third of the world’s fresh water, and much of ___ is in the Great Lakes.
A.
it
B.
them
C.
which
D.
what
【简答题】阅读理解。 Given Australia's size and the fact that early settlements were far apart, Australian society is remarkably homogeneous (同种的). Its citizens are fundamentally prosperous and the way of life in th...
【简答题】阅读理解 Given Australia's size and the fact that early settlements were far apart, Australian society is remarkably homogeneous (同种的). Its citizens are fundamentally prosperous and the way of life in the...
【简答题】下列锅炉压力容器缺陷中最危险的是（ ）。
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